Locations & Dimensions

Most important parameters specify location and dimension of the object constructed
Ex. new FramedRect ( 10, 10, 40, 60, canvas );

Coordinates follow the rules

• Basic unit of measurement is a pixel on the screen
• the y coordinate is upside down
  Larger = closer to bottom of screen
• The origin ( 0, 0 ) is in the upper left of the program's window

NOT upper left of the whole display.
Program's window is called the canvas

• Program's window is called the canvas
  You have to pass canvas as the last parameter to graphical object constructors.
  This Tells the object what window to draw itself in Ex. new Line ( x1, y1 ,x2, y2, canvas );
• Text Passed as a parameter
  Must be enclosed in double quotes (" ")
  Distinguished it from names like canvas
  So, canvas is very different from "canvas"
  Ex. new Text ( " hello there " , x , y, canvas ) ;

• Program's window is called the canvas
  You have to pass canvas as the last parameter to graphical object constructors.
  This tells the object what window to draw itself in Ex. new Line ( x1, y1, x2, y2, canvas );
• Text passed as paremeter
  Must be enclosed in double ( " " )
  Distinguishes it from names like canvas
  So, canvas is very different from "canvas"
  Ex. new Text ( " hello there" , x, y , canvas) ;